BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:System Seminars - Title : Scalable Memory Hierarchies with QoS Gua rantees DTSTART:20120417T133000 DTEND:20120417T143000 DTSTAMP:20260508T194254Z UID:17a08a796832c31bd49a10f0f62af5c1be215f33f25b97b70645e3e3 CATEGORIES:Conferences - Seminars DESCRIPTION:Christos Kozyrakis\, Stanford University\nAbstract :\nAs indus try is heading towards chips with hundreds of cores\, we need memory hiera rchies that can support efficiently large processor counts. In fact\, memo ry hierarchy is the most critical aspect of future multi-core architecture s because the latency and energy overheads of remote memory accesses (on-c hip or off-chip) dwarf the overheads of computational operations.\nThis ta lk will summarize three recent results towards scalable memory hierarchies . First\, we will introduce Zcache\, a technique that increases the number of replacement candidates in order to turn a low associativity cache into a high associativity cache without additional area or energy costs. Secon d\, we will discuss Vantage\, a scheme that allows us to divide a shared c ache into hundreds of fine-grain partitions\, while maintaining high assoc iativity within each partition and providing strict size guarantees. Final ly\, we will present the SCD organization for coherence directories that s cales to thousands of cores with constant latency and area/energy overhead s that grow logarithmically to the number of cores.\nMore importantly\, we can prove analytically and verify experimentally that the behavior of the se techniques is independent of workload patterns. Hence\, we can go beyon d the conventional design approach of "make the common case fast" and buil d memory hierarchies\nwith strong quality of service guarantees across all usage (scalable) without significant over-provisioning of resources (ener gy efficient).\n\nBio :\nChristos Kozyrakis is an Associate Professor of E lectrical Engineering & Computer Science at Stanford University. He works on architectures\, runtime environments\, and programming models for paral lel computing systems. At Berkeley\, he developed the IRAM architecture\, a novel media-processor system that combined vector processing with embedd ed DRAM technology. At Stanford\, he led the Transactional Coherence and C onsistency (TCC) project at Stanford that developed hardware and software mechanisms for programming with transactional memory. He also led the Raks ha project\, that developed practical hardware support and security polici es to deter high-level and low-level security attacks against deployed sof tware. Dr. Kozyrakis is currently working on hardware and software techniq ues for next-generation data centers. He is also a member of the Pervasive Parallelism Lab at Stanford\, a multi-faculty effort to make parallel com puting practical for the masses.\nChristos received a BS degree from the U niversity of Crete (Greece) and a PhD degree from the University of Califo rnia at Berkeley (USA)\, both in Computer Science. He is the Willard R. an d Inez Kerr Bell faculty scholar at Stanford and a senior member of the AC M and the IEEE. Christos has received the NSF Career Award\, an IBM Facult y Award\, the Okawa Fundantion Research Grant\, and a Noyce Family Faculty Scholarship. LOCATION:BC 410 https://plan.epfl.ch/?room==BC%20410 STATUS:CONFIRMED END:VEVENT END:VCALENDAR